Add Matheus's english profile

Closes: https://github.com/Helabs/helabs.github.com/issues/163

![captura de tela 2014-02-28 as 16 51 13](https://f.cloud.github.com/assets/1430031/2297768/b88aaf3a-a0b1-11e3-9781-1533bfbc9a7f.png)

@matheusbras can you please review the content?